ary-ptrn-elem-ary-elem-init.js (2074B)
1 // This file was procedurally generated from the following sources: 2 // - src/dstr-binding/ary-ptrn-elem-ary-elem-init.case 3 // - src/dstr-binding/default/func-decl.template 4 /*--- 5 description: BindingElement with array binding pattern and initializer is used (function declaration) 6 esid: sec-function-definitions-runtime-semantics-instantiatefunctionobject 7 features: [destructuring-binding] 8 flags: [generated] 9 info: | 10 FunctionDeclaration : 11 function BindingIdentifier ( FormalParameters ) { FunctionBody } 12 13 [...] 14 3. Let F be FunctionCreate(Normal, FormalParameters, FunctionBody, 15 scope, strict). 16 [...] 17 18 9.2.1 [[Call]] ( thisArgument, argumentsList) 19 20 [...] 21 7. Let result be OrdinaryCallEvaluateBody(F, argumentsList). 22 [...] 23 24 9.2.1.3 OrdinaryCallEvaluateBody ( F, argumentsList ) 25 26 1. Let status be FunctionDeclarationInstantiation(F, argumentsList). 27 [...] 28 29 9.2.12 FunctionDeclarationInstantiation(func, argumentsList) 30 31 [...] 32 23. Let iteratorRecord be Record {[[iterator]]: 33 CreateListIterator(argumentsList), [[done]]: false}. 34 24. If hasDuplicates is true, then 35 [...] 36 25. Else, 37 b. Let formalStatus be IteratorBindingInitialization for formals with 38 iteratorRecord and env as arguments. 39 [...] 40 41 13.3.3.6 Runtime Semantics: IteratorBindingInitialization 42 43 BindingElement : BindingPatternInitializer opt 44 45 [...] 46 2. If iteratorRecord.[[done]] is true, let v be undefined. 47 3. If Initializer is present and v is undefined, then 48 a. Let defaultValue be the result of evaluating Initializer. 49 b. Let v be ? GetValue(defaultValue). 50 4. Return the result of performing BindingInitialization of BindingPattern 51 with v and environment as the arguments. 52 ---*/ 53 54 var callCount = 0; 55 function f([[x, y, z] = [4, 5, 6]]) { 56 assert.sameValue(x, 4); 57 assert.sameValue(y, 5); 58 assert.sameValue(z, 6); 59 callCount = callCount + 1; 60 }; 61 f([]); 62 assert.sameValue(callCount, 1, 'function invoked exactly once'); 63 64 reportCompare(0, 0);